2008/7/4 Simon Riggs <[EMAIL PROTECTED]>: > > On Mon, 2008-06-23 at 15:13 +0200, Pavel Stehule wrote: > >> this patch enhance current syntax of CREATE FUNCTION statement. It >> allows creating functions with variable number of arguments. This >> version is different than last my patches. It doesn't need patching >> PL. Basic idea is transformation of real arguments (related to >> declared variadic argument) to array. All changes are mostly in >> parser. > > Something for the TODO. > > An added thought with regard to variadic functions: > > when we have them, we should be able to parse/transform repeated > operator sequences into a call to a variadic function, if it exists. > > e.g. w || x || y || z can be transformed into a call to > concat_variadic(w, x, y, z) > > This can then be made to perform better than > > concat(concat(concat(w, x), y), z) > > which would involve lots of wasted memory copies.
good idea Regards Pavel Stehule > > -- > Simon Riggs www.2ndQuadrant.com > PostgreSQL Training, Services and Support > > -- Sent via pgsql-patches mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-patches